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Table 1 Modified Neer Classification [13]

From: Treatment of simple bone cysts using endoscopic curettage: a case series analysis

Classification

Description

Details

A

Healed

Cyst filled with new bone with small radiolucent area (< 1 cm)

B

Healed with a defect

Radiolucent area (< 50% diameter) with enough cortical thickness

C

Persistent cyst

Radiolucent area (≧ 50% diameter) with thin cortical rim

D

Recurrent cyst

Cyst reappears in the obliterated area or increased residual radiolucent area